Mechanical movement



( No Model.)

G. P.1VI0INDOE.

. MBGHANIGAL MOVEMENT. No. 338,541. Patented Mar. 23, 18 86.

PETERS, Pholo-Ulhogapher. Waihingmn. D. c.

UNITED STATES PATENT OFFICE.

GEORGE F. MOINDOE, OF EVERETT, MASSACHUSETTS.

MECHANICAL MOVEMENT.

SPECIFICATION forming part of Letters Patent No 338,541, dated March 23,1886.

Application filed September 16, 1885.

To all whom it may concern.-

Be it known that I, GEORGE F. MoINDoE, a citizen of the United States,residing at Everett, in the county of Middlesex and State ofMassachusetts, have invented a new and useful Mechanical Movement, ofwhich the following is a specification, reference being had to theaccompanying drawings.

My invention relates to mechanism for obtaining intermittent rotarymotion of parts in one and the same direction from parts movingalternately in opposite directions; and the invention consists indevices hereinafter described, in combination with a rack and gear, ashereinafter set forth, and specifically pointed out in the claims.

. In the drawings, Figure l is an elevation of so much of the mechanismas serves to illustrate my invention, the parts being in the positionrequired at the commencement of aforward movement of the rack. Fig. 2shows the same parts in position at a point during said forward motion.Fig. 3 is to illustrate the'position of the lever E during the backwardmovement of the rack. Fig. 4 is an end View of parts as shown in Fig. 1,and Fig. 5is a section taken on the line 11 in Fig. 1, and shows partson the right hand of said line. Fig. 6 illustrates a modification.

The gear A is on a shaft or stud, a, supported by a stand, I), on theframe B, and has a part at c of its periphery free of teeth. A rack, 0,located to engage with the gear, is fitted to slide on and be guided byways (1 011 the frame 13. On the shaft or stud a is pivoted anarm,D,which bears at its outer end a roller, e, which is on a stud theaxis of which is parallel with that of the gear.. The normal position ofthis arm is such that the outer end and roller e is midway of that partof the gear which has no teeth, and that the arm bears against a stop,f, fixed on the gear. The arm is drawn against this stop by means of aspring, 9. There is a roller, h, which is supported by a flat spring, t,in position to be pressed into a notch, j at the back of the gear whenthe part of the periphery of the gear free of teeth is immediately overthe rack.

The rack has a stop, It, thereon,which meets the roller 6 and insuresits proper position when the rack has reached the extreme of its SerialNo. 177,300. (No model.)

backward movement. There is a stop, I, at the other en d of therack,which meets the roller 6 and insures its proper position when therack is at the extreme of its forward movement. On the rack is pivotedat m a lever, E. This lever is formed at n so as to have an incline orbevel on its upper side,or one toward the roller 0, and at its end 0 isformed to meet the stop It. The other end of this lever has pivotedthereto at p a locking-piece, F, which may be swung by a pin, q, on theframe into the position shown in Figs. 1 and 2. The piece F may be swungby a pin, r, on the frame so that the end 0 of the lever may drop down,as shown in Fig. 3.

At the commencement of the forward movement of the rack-that is, towardthe left handthe rollerc will bear against theinclined plane or bevel aof the lever E, and since this lever is locked in position on the rackand the arm D bears against the stop f the gear will be caused to beginits revolution, and comparatively slowly on account ofthe incline orbevel at a. The teeth of the rack will then engage with those of thegear, and while the rack makes its complete movement forward the gearwill make one revolution. At the end of these movements the stop Z willmeet the roller 0, so that the gear is sure to be brought to the rightposition and be locked by means of the roller h and spring 2'. The gearwill not be revolved during the backward movement of the rack, since theteeth of the rack will pass under that part of the gear having no teeth,and the end 0 of the lever has dropped down out of the way of the arm Dand roller 0. At the end of the backward movement of the rack the end 0of the lever is swung upward and the lever is locked by means of the pinq and locking -piece F, as stated above.

Should the lever E fail to be unlocked at the end of the forwardmovement of the rack, or become locked during the backward movement, thearm 1) will be swung away from the stop 1, and thus carry the roller 0so that it will pass over the lever and down the incline or bevel a intoposition shown in Fig. 1, preparatory to the forward movement of therack and revolution of the gear thereby. Thus it appears how the lever Emight be dispensed with a piece having the incline or bevel n rigidlyfixed to the rack taking the place of said lever; but I prefer to usesaid lever, rather than to depend solely upon the swinging arm D, forbringing the roller 0 into the required position with reference totheincline or bevel n.

The form and construction of certain details shown in the drawings andherein described may be somewhat varied and my invention in substance beinvolved, the invention being suitable for application in variousmachines in which intermittent rotary motion in one direction of partsis to be obtained from parts having reciprocating movements. In suchapplications details of mechanism will take such form and be connectedas may be required in each case, adaptation being simply the work of askilled mechanic. Ihave in view thein1- mediate application of myinvention to that class of printing-machines which have animpression-cylinder and a reciprocating bed. In such a machine the gearA will be connected with the impression-cylinder and on the same axistherewith, while the rack C will be connected with the reciprocatingbed, the frame B, being part of the frame-work of the printing-machine,being of the required construction to suitably form such part.

The modification illustrated in Fig. 6 is to insure an equal or balancedpressure on the shaft or stud a. For this purpose I would place uponsaid shaft or stud two arms, D D, one on each side of the gear. Thesetwo arms swing as one, two rollers or a double faced roller, 6 6, havingan axle-bearing in both arms. There will then be two levers, E E

one on each side of the rack Gwhich swing as one, having thelocking-piece F pivoted to them and between them, as shown.

I claim as my invention 1. In combination with a gear having a part ofits periphery free of teeth and provided with an arm, D, and roller 6, arack having pivoted thereto alever, E, inclined or beveled at n,substantially as and for the purpose set forth.

2. The combination of gear A, having part of its periphery free ofteeth, swinging arm D, roller e, and a piece or lever, E, inclined orbeveled at a and fixed to the rack, substantially as and for the purposeset forth.

3. The combination of gear A, arm D, roller 6, rack O, lever E, and stopk, substantially as specified.

4. The combination of gearA, stop or spring and roller h and i, rack O,and piece or lever E, provided with the incline or bevel 11,substantially as specified.

5. The combination of gear A, provided with a roller, 6, rack O, leveror piece E, provided with an incline or bevel, n, and stop I,substantially as specified.

6. The combination of gear A, provided with an arm, D, and roller 6,rack G, lever E, locking-piece F, and a stop or pin, r, substantially asset forth.

7. The combination of gear A, provided with an arm, D, and roller e,rack O, lever E, locking piece F, and stop or pin q, substantially asset forth.

GEORGE F. MOINDOE.

Witnesses:

JOHN WIIYTE, CHARLES E. MILLs.

